Around the late-luteal stretch - the days before the next period - sensitivity often rises. Sounds feel louder. A small comment lands harder. The bar for needing quiet drops. Energy reserves are lower.
It's not fragility. It's the body running at a different setting: hormones shifting, sleep often less restful, the nervous system more responsive. The same input - a busy restaurant, a heavy conversation, a packed weekend - costs more on a sensitive day than on a confident one.
The most useful thing a partner can do is to lower the ambient demand. Smaller plans. Quieter rooms. More patience with delays in replies. It's the social equivalent of dimming the lights - not a fix, just less to react to.
What's not helpful: framing it as 'hormonal' in a dismissive way, problem-solving feelings, or pushing through activities that were on the calendar before the phase arrived. Those days were planned by a different version of the cycle.
When the next phase comes (and it always does), energy and confidence return. The sensitivity wasn't the whole person - just one weather pattern in a longer month.